Interview Questions

Rick E. - " O(n) time from typing import List def generate_parentheses(n: int): res = [] def generate(buf, opened, closed): if len(buf) == 2 * n: if n != 0: res.append(buf) return if opened < n: generate( buf + "(", opened + 1, closed) if closed < opened: generate(buf + ")", opened, closed + 1) generate("", 0, 0) return res debug your code below print(generate_parentheses(1"See full answer

Vince T. - "I own a Google Home and use it everyday. To clarify the question, are we talking about a hardware feature or pure software feature? I assume it can be either. My approach: What is the vision or mission of Google Home? What does good look like? Which KPIs do we want to optimize? Who are the top target segments? What are their pain points or needs that are not met today by Google Home? Let's brainstorm potential game features that can address those needs. Evaluate if we ha"See full answer

Abhi R. - "TCP server/client to facilitate high throughput of incoming metrics.(This is the standard used in the industry by Datadog etc). NoSQL or timeseries database for storing metrics. Timeseries databases are better for aggregating metrics in a given time period. REST API for serving metrics data to visualization frontend."See full answer

K.nithish K. - "MOD = 10**9 + 7 def max_stability(reliability, availability): max_stability = 1 for r, a in zip(reliability, availability): Compute stability of the current server stability = r * a if stability != 0: Multiply into max_stability and take modulo maxstability = (maxstability * stability) % MOD return max_stability reliability = [1, 2, 2] availability = [1, 1, 3] print(max_stability(reliability, availability)) # Output the result mo"See full answer

Navin T. - "Clarification Question: What kind of revenue is Target trying to increase? ( Gross Revenue, Net Revenue .. etc ) Answer: Let's stick to Gross revenue. As I understand, the target has two revenue streams - In-store and online purchases. Are there any other revenue streams I should consider? Answer: No Why Now ?. Answer: we have seen our revenue being impacted due to competition from Amazon and Walmart, and our revenue is flat. Which revenue stream do you see a decline, increase, or flat?"See full answer

Dan D. - "I love the answer and framework, my summary of the interview: it is a slightly modified version of Porter's 5 Forces: User benefit -> Bargaining Power of Buyers Apple benefit -> Talks about the company mission and culture (esp. on the relatively closed eco-system) It was expanded more in the latter half of the interview (SWOT + a bit of Value Chain) Competitive landscape -> Industry Rivalry + Threat of New Entrants + Threat of Substitutes Partnership Impact -> Bargaining Power of"See full answer

Rohit K. - "First, let's align the Airbnb homepage with Airbnb's mission. Airbnb's mission is to "create a world where anyone can belong anywhere by providing healthy travel that is local, authentic, diverse, inclusive and sustainable." The homepage serves as the primary entry point for both potential guests and hosts, setting the stage for their journey and embodying this mission. Now, for the goals of Airbnb homepage, we can consider different aspects like awareness, engagement, and ultimately, driving bo"See full answer

Ankit J. - "Clarifying questions: What is the motivation for Airbnb to consider entering furniture space? Assumption: Data suggests the quality & type of furniture has a direct impact on guests’ Airbnb experience. Many hosts are also converting their Airbnb’s into full-time businesses, so there is a revenue opportunity here while improving the experience. Is Airbnb looking to feature furniture listings on Airbnb.com? It’s still TBD. We want to know if it’s a good idea first. Are there any other g"See full answer

Max V. - "What can be a camera ? point and shoot camera - to capture events Video camera - to record events Surveillance camera - cctv camera to monitor movements Elderly above 65 (male and female) with or without any medical condition Elderly can be tech-savvy but majority would be non-tech savvy. We can also further look to segment this customer base as elderly who are Living with their Children Living in foster care Living alone For the moment , i would restrict the geo"See full answer

Cesar F. - "Outliers are data points that significantly deviate from the majority of the data distribution. They can arise due to various reasons, such as measurement errors, natural variability, or rare events. Outliers can distort statistical analyses and machine learning models, making it crucial to detect and handle them properly."See full answer

Sean L. - " import pandas as pd def findaveragedistance(gps_data: pd.DataFrame) -> pd.DataFrame: #0. IMPORTANT: get the unordered pairs gpsdata['city1']=gpsdata[['origin','destination']].min(axis=1) gpsdata['city2']=gpsdata[['origin','destination']].max(axis=1) #1. get the mean distance by cities avgdistance=gpsdata.groupby(['city1','city2'], as_index=False)['distance'].mean().round(2) avgdistance.rename(columns={'distance':"averagedistance"}, inplace=True) "See full answer

Bhuppi S. - "To measure the success of the WhatsApp engagement and retention is crucial along with monitiozation. So, i will make sure following metrics:** Daily Active Users (DAU) and Monthly Active Users (MAU): DAU and MAU are critical metrics for understanding the scale and engagement level of the user base. A healthy ratio between DAU and MAU (known as stickiness) indicates strong user retention and habitual use. Message Sent/Received Volume: The volume of messages sent and received is a d"See full answer

Piyush D. - "Honestly, In addition to having the right expertise and skills required for this job, I am really looking forward to being part of this organisation’s journey. I am really confident that I will really exceed your expectations in achieving both mine and the company’s goals. I have worked with different teams in different capacities, managed a team of engineers successfully from very early part of my career and that has made me a very easy person to work with. I get things done easily. I am passio"See full answer

Teja G. - "Modernizing banking legacy systems and applications The modernization process typically involves moving from mainframe-based legacy platforms to solutions based on cloud and other modern digital technologies"See full answer

Anonymous Hummingbird - "I responded how capital one wants to help everyone have access to banking and change banking for the better for all. (Tying it to their mission statement) Leaned into this saying how I personally want to use my use my skills to help increase awareness to financial health for the community and serve the community that im a part of."See full answer

Clayton P. - "I've watched all the ML Systems designs interviews and this solution provides a clean baseline for predicting ETA using historical averages, but it falls short of addressing the broader problem of route planning. The system predicts ETA for a given segment and time interval, but it doesn’t explain how to compute the ETA for an entire route or how to integrate this into dynamic path selection. It also lacks depth on handling real-time data, adapting to distribution shift, or reacting to sudden"See full answer